Anyone running a BB with overdrive in a AD truck - The 1947 - Present Chevrolet & GMC Truck Message Board Network

sevt_chevelle · 03-30-2007, 01:39 PM

Am wondering if in order to place a big block and overdrive tranny in a 47-55 chevy truck that one has to modify the firewall and floor.
I would like to install a Buick 455 with overdrive in my 49 but dont want to install a *****in firewall and floor in case I decide to go back to stock.
Will they fit with that stock firewall and floor? If it makes a difference Ill probably end up using the dakota front end from industrial.
Thanks...Eric

cajundragger · 03-30-2007, 09:57 PM

Quote:

Originally Posted by sevt_chevelle

Am wondering if in order to place a big block and overdrive tranny in a 47-55 chevy truck that one has to modify the firewall and floor.
I would like to install a Buick 455 with overdrive in my 49 but dont want to install a *****in firewall and floor in case I decide to go back to stock.
Will they fit with that stock firewall and floor? If it makes a difference Ill probably end up using the dakota front end from industrial.
Thanks...Eric

most likely not...Im cutting the hell out my floor with an ls1/t56...

solidaxel · 03-31-2007, 12:49 AM

Why on earth would you ever think of going backwards to stock, just wondering !!

chevyrestoguy · 03-31-2007, 11:02 AM

At a minimum, you'll have to move the firewall back a little bit and have to open up the area around the transmission bellhousing where the toe boards meet the firewall. If you want the retain the factory look, you could buy a repro firewall/toeboard assembly and install it a few inches back from the stock location, but after it's all said and done, you'll have a ton of work into it, and you'll probably want to weld up about 75% of the unused holes that the factory had. The *****in' and Direct Sheetmetal firewalls are spendy, but they fit really nice and will give you the room you need.

In my opinion, once you stab the throttle and feel what that 455 puts out, you'll forget all about going back to stock. Just make sure you upgrade the brakes and suspension while you're at it.
________
Buy volcano vaporizer

sevt_chevelle · 03-31-2007, 12:25 PM

Thanks for the input. The only reason I have thought about going stock or atleast "updated stock" is because the truck the has been the family since 48, theres alot of memories.
But yet I want to drive and enjoy the truck. Thanks guys...Eric

03-30-2007, 01:39 PM	#1
sevt_chevelle Lost amongst the CORN Join Date: Nov 2002 Location: Northern Iowa Posts: 1,072	Anyone running a BB with overdrive in a AD truck Am wondering if in order to place a big block and overdrive tranny in a 47-55 chevy truck that one has to modify the firewall and floor. I would like to install a Buick 455 with overdrive in my 49 but dont want to install a ***in firewall and floor in case I decide to go back to stock. Will they fit with that stock firewall and floor? If it makes a difference Ill probably end up using the dakota front end from industrial. Thanks...Eric __________________ Currently working on How To Videos and custom metal 70 Chevelle gettin Sliced and Diced Anything But STOCK 70 Chevelle SS455 not a typo its a BUICK BABY** 49 and 72 Chevy Trucks restored to original...close to it Drommer Stor....Norwegian for Dream Big http://s969.photobucket.com/albums/a...lle/?start=all https://www.flickr.com/photos/47922830@N03/ Pictures of my work and projects Last edited by sevt_chevelle; 03-30-2007 at 01:40 PM.

03-31-2007, 12:49 AM	#3
solidaxel Registered User Join Date: Dec 2002 Location: Cactus Patch So. Az Posts: 4,749	Re: Anyone running a BB with overdrive in a AD truck Why on earth would you ever think of going backwards to stock, just wondering !! __________________ 53 TuTone Extended Cab 350 4-Spd 3:08 (SOLD) 53 Chevy Moldy pearl green ZZ-4 4L60E 9" 3:25 55 GMC 1st Black Mll (ZZ4) ZZ6 TKO 600 5 sp 3:73 62 Solidaxle Corvette Roman Red (327 340hp 4spd 3:36) C4 & C5 suspension tube chassis LS 3 4L70E 65 Corvette Coupe 327 350hp 4spd 4:11 78 Black Silverado SWB (350/350) 5.3 & 4L60E 3:42 2000 S-Type 3.0 (wife cruiser) 2003 GMC SCSB 5.3 4L60E 3:42

03-31-2007, 11:02 AM	#4
chevyrestoguy Registered User Join Date: Mar 2005 Location: apple valley, ca Posts: 2,670	Re: Anyone running a BB with overdrive in a AD truck At a minimum, you'll have to move the firewall back a little bit and have to open up the area around the transmission bellhousing where the toe boards meet the firewall. If you want the retain the factory look, you could buy a repro firewall/toeboard assembly and install it a few inches back from the stock location, but after it's all said and done, you'll have a ton of work into it, and you'll probably want to weld up about 75% of the unused holes that the factory had. The ****in' and Direct Sheetmetal firewalls are spendy, but they fit really nice and will give you the room you need. In my opinion, once you stab the throttle and feel what that 455 puts out, you'll forget all about going back to stock. Just make sure you upgrade the brakes and suspension while you're at it. ________ Buy volcano vaporizer Last edited by chevyrestoguy; 02-18-2011 at 11:07 AM.*

03-31-2007, 12:25 PM	#5
sevt_chevelle Lost amongst the CORN Join Date: Nov 2002 Location: Northern Iowa Posts: 1,072	Re: Anyone running a BB with overdrive in a AD truck Thanks for the input. The only reason I have thought about going stock or atleast "updated stock" is because the truck the has been the family since 48, theres alot of memories. But yet I want to drive and enjoy the truck. Thanks guys...Eric __________________ Currently working on How To Videos and custom metal 70 Chevelle gettin Sliced and Diced Anything But STOCK 70 Chevelle SS455 not a typo its a BUICK BABY 49 and 72 Chevy Trucks restored to original...close to it Drommer Stor....Norwegian for Dream Big http://s969.photobucket.com/albums/a...lle/?start=all https://www.flickr.com/photos/47922830@N03/ Pictures of my work and projects



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